底吹钢包用圆孔透气砖冶金效果的水模型

采用水力学模型方法对钢包底吹氩工艺进行了实验研究,对比分析了圆孔型透气砖与狭缝式透气砖对冶炼效果的影响,并研究了圆孔透气砖的孔角和孔径对混匀时间、夹杂物去除率和渣眼面积的影响规律.结果表明:当吹气流量相同时,使用圆孔斜通透气砖时,钢包的混匀时间、夹杂物去除率和渣眼面积均优于狭缝式透气砖;相比于圆孔直通透气砖的钢包,使用圆孔斜通透气砖的钢包混匀时间更短,去除夹杂物效果佳,但渣眼面积略大;对于圆孔斜通透气砖,其孔径越小,钢包混匀时间越短,夹杂物去除率越高,渣眼面积越小.     

Special porous plugs for the production of super clean steels

Fine bubblers to be used as special porous plugs (SPP), have been devised for fine bubbling within steel melts for improving the cleanliness efficiently by floating the micro‐inclusions and removing the dissolved gases. The development principles of the magnesia‐spinel porous plugs are presented. Laboratory water simulator tests have shown that small (< 1 mm), non‐coagulating bubbles, with uniform distribution are formed. The characterisation and testing of the SPP has shown that under steelmaking conditions clogging from metal infiltration is limited. Erosion, cracking or changes in microstructure were not detected in high temperature long‐term endurance tests. With combined treatment in a vacuum induction furnace under a 3 kPa pressure and Ar purging of 18 min through the new SPP, the total oxygen content of the steel melt was decreased from 65 to 7.7 ppm. An application has been filed for a patent for the method for the production of fine bubblers to be used as porous plugs     

冶金过程中有机污染物二(口,恶)英的形成机理与监测

钢铁工业所造成的环境污染已成为制约其发展的重要因素之一.其中有机污染物主要来自废钢回收的电弧炉冶炼过程.本文对冶金过程所产生的主要有机污染物--二噁英的产生行为,产生机理,分析方法,如气相色谱法、气相色谱质谱联用法、各种离子化方式的飞行时间质谱法等以及近几年国内外的研究进展进行了较全面的综述,并对有机污染物的在线监测技术进行了展望.     

The influence of production modes of the electrocontact compaction on the porosity of the powder steel

The influence that the duration of the applied pressure and the passage of the current, current density, and compacting pressure have on the porosity of powder steel is shown. The dependence that the amount of bound carbon in the iron-graphite composition has on the process modes is determined. The porosity of the iron powder is compared with the porosity of the iron-graphite composition under different modes of electrocontact compaction.     

冶金产品化学分析方法标准体系介绍以及方法标准被引用时的注意事项

文章介绍了,台金产品（包括钢铁及合金、生铁及铁合金、铁矿石与直接还原铁、非金属矿）化学分析方法标准体系,以及这些方法标准被产品技术标准所引用时的注意事项。     

冶金炉的开炉和达产

冶金炉的成功烘炉,熔池形成和全面达产,对于大多数例行操作的操作工而言是一项挑战.开炉方案对于炉子能否达到设计炉龄和及时达到额定产能具有重大的影响.一个炉子的成功投产和达产的先决条件包括：充分理解技术上的制约因素,周密的计划以及业主操作方、设计方、建造方和第三方顾问的密切合作.为了使开炉和达产周期最短化,同时保证炉子的完整性和炉龄,本文讲述了技术和经验层面的原理,包括耐火材料和支撑结构（炉壳或有弹簧调节的绑定系统）相互关联的膨胀行为、电极焙烧的原理、加热速率的影响、初期熔池的形成和炉子的使用寿命.     

冶金方法在太阳能级多晶硅制造中的应用

多晶硅作为太阳能转换电能的基础材料,近年来受到广泛关注.本文综述了生产多晶硅的各种冶金方法,主要分析各种冶金方法的特点、发展趋势和可行性,并重点讨论了低成本生产太阳能级多晶硅的方法.     

冶金生产余能回收的一种新的能量分析法

针对冶金生产余能回收过程,结合传统热平衡分析法和火用分析法提出了结合两者优点的新能量分析方法.并运用国内某大型钢铁厂的生产数据及相关参数建立起针对钢铁生产余能资源的能量分析模型.基于该模型提出了理论工序最小能耗,分析了各工序节能潜力.